A227726 - OEIS

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A227726 as a simple table

`n`		`a(n)`
`0`		`1`
`1`		`4`
`2`		`20`
`3`		`112`
`4`		`660`
`5`		`4004`
`6`		`24752`
`7`		`155040`
`8`		`980628`
`9`		`6249100`
`10`		`40060020`
`11`		`258048960`
`12`		`1668903600`
`13`		`10829900592`
`14`		`70480305440`
`15`		`459823234112`
`16`		`3006465218196`
`17`		`19694758782300`
`18`		`129235131438140`
`19`		`849311959095600`
`20`		`5589126007740660`
`21`		`36825913869817380`
`22`		`242910890642347200`

[1,4,20,112,660,4004,24752,155040,980628,6249100, 40060020,258048960,1668903600,10829900592, 70480305440,459823234112,3006465218196, 19694758782300,129235131438140,849311959095600, 5589126007740660,36825913869817380, 242910890642347200]

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Last modified April 25 05:18 EDT 2024. Contains 371964 sequences. (Running on oeis4.)